Definition: The term "prepeduncle" is often used in medicine to refer to a small, soft tissue structure that develops on the surface of the ear. This structure is called a prepeduncle or preauricular bone, and it plays an important role in the development of the inner ear, which contains the cochlea, the part of the ear responsible for hearing. The prepeduncle is located between the frontalis muscle and the infraorbital process (the area between the jaw